Respiratory system

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Across
  1. 1. The microscopic air-sacs of the lungs
  2. 4. The agency which transports oxygen to all parts of the body
  3. 5. Jerky incomplete inspiration due to blockage of the respiratory tract
  4. 7. This closes the windpipe at the time of swallowing
  5. 9. Another word for Adam's apple
Down
  1. 2. The oxygen inhaled in combines with haemoglobin present in the red blood cells forming an unstable compound is called
  2. 3. Vibration of soft palate during breathing when mouth is kept open while sleeping.
  3. 6. It is a protective mechanism through which a foreign irritant particle is thrown out of the lungs suddenly and forcefully.
  4. 8. The common passage for the food and air is